The White House says President Obama has kicked the habit and stopped smoking. "It's been probably about nine months since he last smoked a cigarette," says Robert Gibbs, the President's press secretary, in an interview with CNN. Mr. Obama, like a lot of smokers, has quit before and started back up again. This time may be different. Gibbs says this is the longest he's known the President to go without a cigarette. He quit by chewing Nicorette gum and exercising a lot of will power.

References:
Stop smoking: Follow the President's example. CNN.